Examples
- MySQL (Support and licensing)
- Eucalyptus
- Rapid7, with its Metasploit Pro and Metasploit Express products which are based on the open source Metasploit core framework.
It has been suggested by Bradley M. Kuhn that Canonical Ltd., maintainers of Ubuntu are preparing to go open core, but have not done so, according to the Canonical's contributor agreement and their Project Harmony which aimed "to assist organisations which use contribution agreements by providing standardised variable templates with clear and concise explanations...."
Read more about this topic: Commercial Open Source Software
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